<div id="customer_report" class="menu hide">
    <?php echo $html->link('Stock in', array('controller' => 'cust_reports', 'action' => 'stock_in_search')); ?>
    <a class="{menu: 'sub_menu_stock_out_report'}">Stock out</a>
</div>

<div id="sub_menu_stock_out_report" class="menu hide">
    <?php echo $html->link('Group by Cost Center', array('controller' => 'cust_reports', 'action' => 'stock_out_cost_center_search')); ?>
    <?php echo $html->link('Group by Part', array('controller' => 'cust_reports', 'action' => 'stock_out_search')); ?>
</div>